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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 140 (1955), S. 166-168 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-2323
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé L'allotransplantation des tissus parathyroïdes chez l'homme est souhaitable pour traiter l'hypoparathyroïdie survenant au décours de l'ablation malencontreuse des parathyroïdes lors d'une thyroïdectomie. Jusqu'à présent, l'allotransplantation n'avait pas tellement été utilisée car ses avantages étaient contrebalancés par le besoin de l'immunosuppression. Pour résoudre ce problème, nous avons employé la méthode dite de microencap-sulation, utilisée déjà pour la transplantation de tissu parathyroïde en allotransplantation expérimentale. Nous avons enregistré des succès à long terme chez le rat. Après isolement et culture des tissus, des fragments provenant des parathyroïdes de 280 rats Lewis ont été encapsulés dans l'alginate de baryte et transplantés chez le rat DA hypocalcémique. Entre les 7è et 9è jours postopératoires les rats receveurs avaient une calcémie normale. Ceci est la première publication de survie à long terme de parathyroïdes microencapsulés et allotransplantés.
    Abstract: Resumen El alotrasplante de tejido paratiroideo en humanos es deseable como tratamiento del hipoparatiroidismo prolongado, o sea de aquel que resulta de la remoción accidental de las glándulas paratiroides en el curso de cirugía tiroidea. Hasta el presente el trasplante de paratiroides no ha sido utilizado clínicamente, por cuanto sus ventajas son anuladas por la necesidad de mantener un régimen de inmunosupresión. Con el objeto de controlar la inmunogenicidad del tejido a ser trasplantado, hemos empleado el método de microencapsulación, el cual fue ensayado primeramente en el trasplante de células insulares en experimentos sobre alotrasplante de tejido paratiroideo. Hemos logrado éxito a largo plazo en un modelo en la rata. Luego del aislamiento y cultivo tisular, fragmentos de glándula paratiroides de ratas 280 Lewis fueron encapsuladas en alginato de Bario e injertados en ratas hipocalcémicas. Entre el 7° y el 90° día luego del trasplante, las ratas receptoras exhibían niveles normales de calcio sérico. Este es el primer informe sobre un trasplante exitoso a largo plazo y sobre la función de téjido paratiroideo alotrasplantado por el método de microen-capsulación.
    Notes: Abstract Allotransplantation of parathyroid tissue in humans is desirable for treating long-term hypoparathyroidism (e.g., after inadvertent removal of parathyroid glands during thyroid surgery). Until now, parathyroid allotransplantation was not used clinically because its advantages were outweighted by the need of immunosuppression. To overcome the immunogenicity of the tissue to be transplanted, we employed the method of microencapsulation; first tried in islet cell transplantation for experimental allotransplantation of parathyroid tissue. We have been able to achieve long-term success in a rat model. After isolation and tissue culture, tissue pieces from parathyroid glands of 280 Lewis rats were encapsulated in barium alginate and grafted into hypocalcemic DA rats. From the 7th to the 90th day after transplantation the recipient rats (DA rats) showed a normal serum calcium concentration. This is the first report of successful long-term survival and function of microencapsulated allotransplanted parathyroid tissue.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of cancer research and clinical oncology 115 (1989), S. 537-542 
    ISSN: 1432-1335
    Keywords: Small-cell lung cancer ; Cell lines ; Tetanus toxin ; Flow cytometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Tetanus toxin labeling of human lung cancer cell lines was investigated using direct and indirect immunofluorescence and immunohistochemical staining. Cells of characterized permanent cell lines, eight small-cell lung cancer (SCLC) cell lines of classic subtype, six SCLC cell lines of variant subtype and seven non-small-cell lung cancer (NSCLC) cell lines, were incubated with a saturating concentration of tetanus toxin. For staining, fluorescein-isothiocyanate-(FITC)-conjugated anti-(tetanus toxin) antibodies were used or a mouse monoclonal anti-(fragment C) antibody with subsequent binding of FITC-conjugated anti-(mouse Ig) antibody or peroxidase-antiperoxidase complex. Only SCLC showed an intense fluorescence/immunoreactivity restricted to the cell membrane. Quantitative analysis of tetanus toxin labeling by flow cytometry revealed the percentage of positive cells to be between 35% and 95% in SCLC without obvious differences between the classic and variant subtypes of SCLC. In NSCLC the percentage of positive cells was lower than 10%. These results demonstrate that SCLC in contrast to NSCLC can be labeled with tetanus toxin, emphasizing the neuroendocrine properties of this tumor, and that tetanus toxin labeling may become a useful diagnostic marker for SCLC cells in cytology.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-1335
    Keywords: Nucleolar organizer regions ; Hormone receptor content ; Ki67 immunostaining ; Breast cancer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The value of automatic image analysis in the investigation of nucleolus regions (AgNOR) has been examined in tissue sections of 52 malignant and 30 benign breast lesions. Determination of the AgNOR number per cell alone revealed a considerable overlap between benign (range 1.2–3.8) and malignant specimens (range 1.5–16.2). They differed however, highly significantly (P〈0.001) in their AgNOR sizes. In benign breast disorders the mean AgNOR area per tumour ranged from 0.22 μm2 to 1.07 μm2 (mean 0.39 μm2), whereas in carcinomas AgNOR sites ranged from 0.05 μm2 to 0.22 μm2 (mean 0.09 μm2). AgNOR counts showed a good correlation with histopathological grade (P〈0.05), aneuploidy (P〈0.01), proliferation rate as determined by Ki67 immunostaining (P〈0.01), as well as oestrogen and progesterone receptor content (P〈0.01). Image analysis proved to be advantageous over AgNOR counting alone as it facilitated the standardization of the AgNOR technique itself and thus, significantly improved its diagnostic specifity.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-1335
    Keywords: Small cell lung cancer ; Cell lines ; Serum free medium ; Growth properties ; Morphological characteristics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Cell lines from SCLC were established with a success rate of 43% from different metastatic sites of treated and untreated patients. All 6 SCLC cell lines grew as floating cell aggregates without substrate adherence. The degree of aggregation ranged from very tight spheroids to very loose sheets and chains. This gross morphological property showed a striking correlation to the PDT, with short PDTs in loose growing cell lines and long PDTs in tight growing cell lines. Cell size and nuclear features, i.e., chromatin pattern and nucleolar prominence, also seemed to correlate with the PDT and gross morphology. All SCLC cell lines had dense core granules by electron microscopical examination. Several different serum-free and serum-supplemented growth media were tested for their feasibility in estabilishing and permanently growing SCLC. Serum-free SIT medium and SIT 2.5 medium provided the best results in liquid culture. For semisolid SCLC cultivation, R10 medium was suprior to all other media tested. These cell lines are currently under intensive biochemical, molecular biological, and cytogenetical investigation in different laboratories and thus provide a tool for studying the biology of lung cancer.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 36 (1949), S. 249-250 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 39 (1952), S. 107-108 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 39 (1952), S. 131-132 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 42 (1955), S. 510-510 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Journal of assisted reproduction and genetics 14 (1997), S. 596-599 
    ISSN: 1573-7330
    Keywords: smoking ; in vitro fertilization ; embryo transfer ; meta-analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Purpose: Including our own data and seven relevant publications from the literature, this meta-analysis aimed to establish the influence of the status of female smokers on the clinical pregnancy rate after the first attempt at in vitro fertilization–embryo transfer (IVF-ET). Methods: We started to collect information about our own patient's smoking habits in January 1996 to evaluate prospectively the influence on IVF success. Information regarding 799 patients (607 nonsmokers and 192 smokers) was obtained. Additionally we retrieved seven relevant publications from the unabridged MEDLINE1982–1996. They were recalculated to first cycles, because from a biometrical point of view, only the results of the first IVF cycle are really well comparable, as the number of necessary IVF cycles always correlates with the number of pregnancies. These data were compared in the nonparametric sign test according to Dixon–Mood and calculated as relative success ratios, defined as the quotient of the probability of IVF-ET success of nonsmokers divided by that of smokers for each publication. Results: This meta-analysis, based on a total of 2314 first IVF-ET treatments, showed that almost twice as many IVF-ET cycles were needed for smokers as for nonsmokers to become pregnant. For the success quotient, we obtained a ratio of 1.79, with an associated 95% confidence interval of from 1.24 to 2.59. The total analysis shows, with a P value of less than 0.01, significantly higher pregnancy rates (21%) in nonsmokers compared to smokers (14%). Conclusions: Based on the analyzed data there exists—from a statistical point of view—a significant negative effect on the chances of success for smokers to become pregnant compared to nonsmokers.
    Type of Medium: Electronic Resource
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